Compilation.md

-## Windows
+# Windows
+
+## Cygwin and Windows PATH
 
 Install cygwin from https://www.cygwin.com. Accept all defaults and select View "Full". Install the following packages:
  * mingw64_x86_64-gcc-g++
@@ -16,6 +18,8 @@ Install cygwin from https://www.cygwin.com. Accept all defaults and select View
 
 Type "path" in the Windows search box and choose "Edit the system environment variables". Go to "Advanced" and select "Environment variables". If the `PATH` variable does not exist (note the ALL CAPS!), create it and set it to `C:\cygwin64\usr\local\bin\;C:\cygwin64\usr\local\lib;C:\cygwin64\usr\local\petsc\complex_mumps_seq\lib;C:\cygwin64\usr\x86_64-w64-mingw32\sys-root\mingw\bin`. If `PATH` already exists, append the value (don't forget the semicolon!).
 
+## Cygwin terminal and Bash environment variables
+
 Open the Cygwin terminal.
 
 Edit the `~/.bash_profile` and add the following at the end:
@@ -28,6 +32,8 @@ export PETSC_DIR=/usr/local/petsc
 export PETSC_ARCH=complex_mumps_seq
 ```
 
+## PETSc
+
 Download and configure PETSc:
 ```shell
 cd /usr/local
@@ -50,6 +56,8 @@ Build and install PETSc:
 make install
 ```
 
+## Gmsh
+
 Download, build and install Gmsh (here we build a barebones version - see the Gmsh wiki to compile a full-featured version with OpenCASCADE, the graphical user interface, ...):
 ```shell
 cd
@@ -70,6 +78,8 @@ cp gmsh-git-Windows64-sdk/include/* /usr/local/include/
 cp gmsh-git-Windows64-sdk/lib/* /usr/local/lib/
 ```
 
+## GmshFEM
+
 Build and install GmshFEM:
 ```shell
 cd
@@ -81,6 +91,8 @@ cmake ..
 make install
 ```
 
+## GmshDDM
+
 Build and install GmshDDM:
 ```shell
 cd